Verified Commit c248c181 authored by sanketh's avatar sanketh Committed by ma1
Browse files

Bug 40209: Implement Basic Crypto Safety 

Adds a CryptoSafety actor which detects when you've copied a crypto
address from a HTTP webpage and shows a warning.

Closes #40209.

Bug 40428: Fix string attribute names
parent bc8044cc

browser/actors/CryptoSafetyChild.jsm

0 → 100644
+90 −0
Original line number Diff line number Diff line 
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* Copyright (c) 2020, The Tor Project, Inc.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */



var EXPORTED_SYMBOLS = ["CryptoSafetyChild"];



const { Bech32Decode } = ChromeUtils.import(

  "resource://gre/modules/Bech32Decode.jsm"

);



const { XPCOMUtils } = ChromeUtils.import(

  "resource://gre/modules/XPCOMUtils.jsm"

);



const lazy = {};



XPCOMUtils.defineLazyPreferenceGetter(

  lazy,

  "isCryptoSafetyEnabled",

  "security.cryptoSafety",

  true // Defaults to true.

);



function looksLikeCryptoAddress(s) {

  // P2PKH and P2SH addresses

  // https://stackoverflow.com/a/24205650

  const bitcoinAddr = /^[13][a-km-zA-HJ-NP-Z1-9]{25,39}$/;

  if (bitcoinAddr.test(s)) {

    return true;

  }



  // Bech32 addresses

  if (Bech32Decode(s) !== null) {

    return true;

  }



  // regular addresses

  const etherAddr = /^0x[a-fA-F0-9]{40}$/;

  if (etherAddr.test(s)) {

    return true;

  }



  // t-addresses

  // https://www.reddit.com/r/zec/comments/8mxj6x/simple_regex_to_validate_a_zcash_tz_address/dzr62p5/

  const zcashAddr = /^t1[a-zA-Z0-9]{33}$/;

  if (zcashAddr.test(s)) {

    return true;

  }



  // Standard, Integrated, and 256-bit Integrated addresses

  // https://monero.stackexchange.com/a/10627

  const moneroAddr =

    /^4(?:[0-9AB]|[1-9A-HJ-NP-Za-km-z]{12}(?:[1-9A-HJ-NP-Za-km-z]{30})?)[1-9A-HJ-NP-Za-km-z]{93}$/;

  if (moneroAddr.test(s)) {

    return true;

  }



  return false;

}



class CryptoSafetyChild extends JSWindowActorChild {

  handleEvent(event) {

    if (

      !lazy.isCryptoSafetyEnabled ||

      // Ignore non-HTTP addresses.

      // We do this before reading the host property since this is not available

      // for about: pages.

      !this.document.documentURIObject.schemeIs("http") ||

      // Ignore onion addresses.

      this.document.documentURIObject.host.endsWith(".onion") ||

      (event.type !== "copy" && event.type !== "cut")

    ) {

      return;

    }



    this.contentWindow.navigator.clipboard.readText().then(clipText => {

      const selection = clipText.replace(/\s+/g, "");

      if (!looksLikeCryptoAddress(selection)) {

        return;

      }

      this.sendAsyncMessage("CryptoSafety:CopiedText", {

        selection,

        host: this.document.documentURIObject.host,

      });

    });

  }

}

browser/actors/CryptoSafetyParent.jsm

0 → 100644
+82 −0
Original line number Diff line number Diff line 
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* Copyright (c) 2020, The Tor Project, Inc.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */



var EXPORTED_SYMBOLS = ["CryptoSafetyParent"];



const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");

const { XPCOMUtils } = ChromeUtils.import(

  "resource://gre/modules/XPCOMUtils.jsm"

);



const lazy = {};



ChromeUtils.defineModuleGetter(

  lazy,

  "TorDomainIsolator",

  "resource://gre/modules/TorDomainIsolator.jsm"

);



ChromeUtils.defineLazyGetter(lazy, "CryptoStrings", function () {

  return new Localization(["toolkit/global/tor-browser.ftl"]);

});



XPCOMUtils.defineLazyPreferenceGetter(

  lazy,

  "isCryptoSafetyEnabled",

  "security.cryptoSafety",

  true // Defaults to true.

);



class CryptoSafetyParent extends JSWindowActorParent {

  async receiveMessage(aMessage) {

    if (

      !lazy.isCryptoSafetyEnabled ||

      aMessage.name !== "CryptoSafety:CopiedText"

    ) {

      return;

    }



    let address = aMessage.data.selection;

    if (address.length > 32) {

      address = `${address.substring(0, 32)}…`;

    }



    const [titleText, bodyText, reloadText, dismissText] =

      await lazy.CryptoStrings.formatValues([

        { id: "crypto-safety-prompt-title" },

        {

          id: "crypto-safety-prompt-body",

          args: { address, host: aMessage.data.host },

        },

        { id: "crypto-safety-prompt-reload-button" },

        { id: "crypto-safety-prompt-dismiss-button" },

      ]);



    const buttonPressed = Services.prompt.confirmEx(

      this.browsingContext.topChromeWindow,

      titleText,

      bodyText,

      Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +

        Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_1,

      reloadText,

      dismissText,

      null,

      null,

      {}

    );



    if (buttonPressed === 0) {

      const { browsingContext } = this.manager;

      const browser = browsingContext.embedderElement;

      if (browser) {

        lazy.TorDomainIsolator.newCircuitForBrowser(

          browser.ownerGlobal.gBrowser

        );

      }

    }

  }

}

browser/actors/moz.build

+2 −0
Original line number Diff line number Diff line
@@ -56,6 +56,8 @@ FINAL_TARGET_FILES.actors += [ 
    "ContentSearchParent.sys.mjs",

    "ContextMenuChild.sys.mjs",

    "ContextMenuParent.sys.mjs",

    "CryptoSafetyChild.jsm",

    "CryptoSafetyParent.jsm",

    "DecoderDoctorChild.sys.mjs",

    "DecoderDoctorParent.sys.mjs",

    "DOMFullscreenChild.sys.mjs",

browser/components/BrowserGlue.sys.mjs

+18 −0
Original line number Diff line number Diff line
@@ -612,6 +612,24 @@ let JSWINDOWACTORS = { 
    },



    messageManagerGroups: ["browsers"],



    allFrames: true,

  },



  CryptoSafety: {

    parent: {

      moduleURI: "resource:///actors/CryptoSafetyParent.jsm",

    },



    child: {

      moduleURI: "resource:///actors/CryptoSafetyChild.jsm",

      group: "browsers",

      events: {

        copy: { mozSystemGroup: true },

        cut: { mozSystemGroup: true },

      },

    },



    allFrames: true,

  },

toolkit/content/license.html

+32 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ 
      <li><a href="about:license#arm">ARM License</a></li>

      <li><a href="about:license#babel">Babel License</a></li>

      <li><a href="about:license#babylon">Babylon License</a></li>

      <li><a href="about:license#bech32">Bech32 License</a></li>

      <li><a href="about:license#bincode">bincode License</a></li>

      <li><a href="about:license#boost">boost License</a></li>

      <li><a href="about:license#bsd2clause">BSD 2-Clause License</a></li>
@@ -1900,6 +1901,37 @@ furnished to do so, subject to the following conditions: 
The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.



THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

</pre>





    <hr>



    <h1><a id="bech32"></a>Bech32 License</h1>



    <p>This license applies to the file

      <code>toolkit/modules/Bech32Decode.jsm</code>.

    </p>



<pre>

Copyright (c) 2017 Pieter Wuille



Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:



The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.



THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE